ISOW7842FDWE

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Digital isolators have become an increasingly important component in electrical systems, as they limit the exposure to electrical noise and hazardous voltages within the system. The ISOW7842FDWE is a digital isolator which helps to provide electrical isolation in low voltage applications, and is suitable for signal and power isolation.

The ISOW7842FDWE isolator consists of two gallium arsenide (GaAs) Heterojunction Bipolar Transistor (HBT) monolithic integrated circuits, driven by CMOS logic and operating at a frequency of up to 50 MHz. Operating at a single 3.5V to 5.5V supply voltage, the digital isolator supports an isolation voltage of up to 3000Vrms. The feature that makes the ISOW7842FDWE stand out from other isolators is its low power consumption, with typical consumption under 30mW.

The ISOW7842FDWE digital isolator is capable of transmitting two data lanes, and allows data transfer between two separated domains. This bi-directional isolator supports a data rate of up to 25 Mbps in each direction, and is applicable to applications requiring communications between two isolated domains. The ISOW7842FDWE digital isolator is optically-coupled, meaning that it requires no direct electrical connection between the circuits, reducing interference and decreasing the risk of damage.

The working principle of the ISOW7842FDWE digital isolator is based on two HBT transistors arranged in an H-bridge configuration, which are driven by CMOS logic. The digital isolator consists of a logic isolation cell as well as a data isolation cell, which permit transmission of both data and power between the two domains.

The logic isolation cell functions as an input buffer and an output driver, with an internal DC/DC converter that provides the power for the output driver side. This configuration allows digital signals of 0 to 0.8V logic level to be transmitted via the data line. The data isolation cell is responsible for transferring the data between the two domains, using a dual data lane structure.

The ISOW7842FDWE digital isolator is suitable for a wide range of applications, including industrial process control, building automation, automotive, medical instrumentation and equipment. This digital isolator provides electrical isolation, noise suppression and voltage protection for these applications, while still providing low power consumption and a wide operating voltage, making it well suited to many low voltage systems.

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